Scilab Function
Last update : April 1993

invr - inversion of (rational) matrix

### Calling Sequence

  `F = invr(H)`

### Parameters

- `H`: polynomial or rational matrix
- `F`: polynomial or rational matrix

### Description

If `H` is a polynomial or rational function matrix, `invr` computes `H^(-1)` using Leverrier's algorithm (see function code)

### Examples

    s=poly(0,'s')
    H=[s,s*s+2;1-s,1+s]; invr(H)
    [Num,den]=coffg(H);Num/den
    H=[1/s,(s+1);1/(s+2),(s+3)/s];invr(H)

### See Also

`glever`, `coffg`, `inv`,